What really happened when Dad died? For nearly a thousand days, Alva has been wondering about this, and now she has decided to find out the truth. At the same time, her mother is trying to move on with her life, looking forward to opening a café in a boathouse she recently bought. But something seems to be wrong with the boathouse.

Meanwhile, a little girl and her mother arrive at Hovenäset. Alva senses that something isn’t right about the woman, and the mysteries only deepen. A cat begins following Alva around town, and at night she hears eerie noises. It sounds like her father is sneaking around outside her bedroom door, but he’s been dead for years. Soon, Alva realizes that she is in danger. Some secrets are simply meant to be left alone…

Grave of Secrets is the second installment in The Bohus Coast Trilogy, where the three friends Heidi, Alva, and Harry spend their summer holiday with dark secrets and cruel events from the past.